Blake Shelton has grown very fond of fiancee Gwen Stefani's three sons over the years that they've been together. In fact, in a new interview, the country superstar says he can't picture not having them in his life anymore.

Shelton's first two marriages produced no children, but he proved to be a natural with Stefani's boys when the couple began dating in 2015 after meeting on the set of The Voice. As his relationship has deepened with now-15-year-old Kingston, 13-year-old Zuma and Apollo, who is 7, Shelton has stepped into a protective, fatherly role that he relishes.

"I take it very serious, but I also have a blast with it," the "Minimum Wage" singer says in an interview with the Ride with Kimo & Heather on California country station KFROG 95.1. "I don't take it so serious that I'm not enjoying this time because I really am, especially now that we're five years into this thing."

"I can't imagine my life without these kids now," he says.

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Shelton will become an instant stepfather to Stefani's kids when he marries the pop superstar, and he says he has a great role model in his own stepfather, whom he calls "one of my heroes."

"I love my stepfather and he's like a father to me, so I have a good inspiration in my life on how to do this and the kind of stepdad I want to be," the singer states.

Shelton and Stefani spent most of their coronavirus quarantine on his ranch in Oklahoma with her kids before moving into their first home together, a massive California mansion, in time for the new school year. They announced their engagement in October. The couple have not publicly revealed a wedding date.

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